package com.lei.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lei.dto.DishDto;
import com.lei.entity.Dish;
import com.lei.entity.DishFlavor;
import com.lei.mapper.DishMapper;
import com.lei.service.DishFlavorService;
import com.lei.service.DishService;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author lei
 * @verson:1.8
 */
@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品同时保存口味
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        Long id = dishDto.getId();//菜品id
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(id);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    //根据id查询菜品id和口味
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查菜品基本信息，从dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();

        BeanUtils.copyProperties(dish, dishDto);
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        LambdaQueryWrapper<DishFlavor> eq = queryWrapper.eq(DishFlavor::getId, dish.getId());
        List<DishFlavor> list = dishFlavorService.list(eq);
        dishDto.setFlavors(list);
        return dishDto;
    }

    //更新菜品，同时插入菜品对应的口味数据，需要操作两种表：dish，dish_flavor
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表
        this.updateById(dishDto);

        //清理当前菜品对应的口味数据--dish——flavor
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());

        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);

    }
}
